US4537877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate oil-absorbing composition to absorb oil
Assignee: Papyrus Kopparfors AB
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Filing: 1983-05-10
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Granted: 1985-08-27
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Expires: 2003-05-10
Abstract
Abstract A process for absorbing oil and a particulate oil-absorbing composition are provided, which composition in dust form displays a low explosion hazard and a low flammability, but which after absorption of oil is flammable and entirely consumed when burned, the particles comprising as the major component at least 50% by weight hydrophobic cellulose pulp fibers blended with at least 30% up to 50% of an inorganic cellulose paper pulp filler.
Inventors
- 👤 Thomas Ericsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:15
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; C09; C09K; C09K3/00; C09K3/32; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
64 words
A particulate oil-absorbing composition which in dust form displays a low explosion hazard and a low flammability, but which after absorption of oil is flammable and entirely consumed when burned, the particles consisting essentially of as the major component at least 50% by weight hydrophobic cellulose pulp fibers in admixture with at least 30% up to 50% of an inorganic cellulose paper pulp filler.
Claim 2
Dependent Claim
64 words
A particulate oil-absorbing composition which in dust form displays a low explosion hazard and a low flammability, but which after absorption of oil is flammable and entirely consumed when burned, the particles consisting essentially of as the major component at least 50% by weight hydrophobic cellulose pulp fibers in admixture with at least 30% up to 50% of an inorganic cellulose paper pulp filler.
Claim 3
Dependent Claim
41 words
A particulate oil-absorbing composition according to claim 1, in which the cellulose pulp fibers comprise reject fibers from a cellulose pulp selected from the group consisting of mechanical pulp, chemimechanical pulp, semichemical pulp, sulphate pulp and sulphite pulp and mixtures thereof.
Claim 4
Dependent Claim
16 words
A particulate oil-absorbing composition according to claim 1 in which the cellulose pulp fibers are sized.
Claim 5
Dependent Claim
26 words
A particulate oil-absorbing composition according to claim 3 in which the size is selected from the group consisting of rosin, starch and natural and synthetic resins.
Claim 6
Dependent Claim
18 words
A particulate oil-absorbing composition according to claim 1 in which the inorganic cellulose paper pulp filler is kaolin.
Claim 7
Dependent Claim
18 words
A particulate oil-absorbing composition according to claim 1 in which the inorganic cellulose paper filler is calcium carbonate.
Claim 8
Dependent Claim
18 words
A particulate oil-absorbing composition according to claim 1 in which the inorganic cellulose paper pulp filler is talc.
Claim 9
Dependent Claim
39 words
A particulate oil-absorbing composition according to claim 1 in which the cellulose pulp fibers comprise about 70% by weight of a mixture of mechanical fibers and sulphate fibers sized with rosin size, and about 30% by weight of kaolin.
Claim 10
Dependent Claim
11 words
A particulate oil-absorbing composition according to claim 1 in granulated form.
Claim 11
Dependent Claim
11 words
A particulate oil-absorbing composition according to claim 1 in shredded form.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |